Encontrados 30 documentos, a visualizar página 1 de 3
Simultaneous degradation by corrosion and wear of titanium in artificial saliva...
Souza, J.C.M; Barbosa, S. L; Ariza, E.; Celis, J-P.; Rocha, L. A.Article in press ; The degradation of titanium-based oral rehabilitation systems can occur by corrosion and wear processes taking place simultaneously (tribocorrosion) and influenced by the presence of fluorides. In this study, the tribocorrosion behavior of titanium in artificial saliva solutions containing fluorides is investigated. Before sliding tests were started up, electrochemical measurements such as o...
Corrosion behaviour of Al/Al3Ti and Al/Al3Zr functionally graded materials prod...
Ferreira, S. C.; Rocha, L. A.; Ariza, E.; Sequeira, P. D.; Watanabe, Yoshimi; Fernandes, J.C.S.Intermetallic particles, Al3Ti and Al3Zr were formed in Al–5mass%Ti and Al–5mass%Zr alloys, respectively, by centrifugal casting, in order to create functionally graded materials (FGMs). At present, no information is available on the influence of the amount of intermetallics on the electrochemical properties of these alloys. In this paper, the corrosion resistance of Al/Al3Ti and Al/Al3Zr FGMs was investigated...
Effect of oral biofilms on the biotribocorrosion of titanium
Souza, J. C. M.; Ariza, E.; Henriques, Mariana; Oliveira, Rosário; Teughels, W.; Rocha, L. A.; Celis, J. P.The oral cavity is a complex environment where corrosive substances from dietary, human saliva and oral biofilms may accumulate in retentive areas of implant-supported prostheses promoting a corrosion of their surfaces. On the other side, during mastication, micro-movements may occur in artificial joints causing a relative contact motion between surfaces. Both processes result in a tribocorrosion system. The ob...
Wear and corrosion of titanium in oral simulating environments
Souza, J. C. M.; Ariza, E.; Henriques, Mariana; Oliveira, Rosário; Teughels, W.; Rocha, L. A.; Celis, J. P.The oral cavity can be considered as an aggressive environment to restorative materials considering that several acidic substances can be retained in the saliva and biofilms as well as loads from mastication and abrasive particles take place in the wear of oral surfaces. The objective of this work is to investigate the in-vitro corrosion and wear in fluoridated artificial saliva and in presence of biofilms. Ele...
Biotribocorrosion behavior of titanium in the presence of biofilms
Souza, J. C. M.; Ariza, E.; Henriques, Mariana; Oliveira, Rosário; Teughels, W.; Rocha, L. A.; Celis, J. P.In the oral cavity, restorative surfaces such as of titanium-based implant systems are in contact with several acidic substances originated from dietary intake and microbial metabolism. During the mastication, a simultaneous corrosion-wear process known by Biotribocorrosion can take place on the surfaces which are in relative contact motion. The objective of this work is to investigate the in-vitro simultaneous...
TiCxOy thin films for decorative applications : tribocorrosion mechanisms and s...
Mathew, M. T.; Ariza, E.; Rocha, L. A.; Fernandes, Ana C.; Vaz, F.Prova Tipográfica (In Press) ; Recently, tribocorrosion is widely accepted as an interdisciplinary area of research and such studies on various materials are gaining more attention by scientists and engineers due to its practical and economical significances in a wide range of applications. The main objective of the present work were to investigate the tribocorrosion behaviour of single layered titanium oxycar...
Micro-abrasion resistance of thermochemically treated steels in aqueous solutio...
Mathew, M. T.; Stack, M. M.; Matijevic, B.; Rocha, L. A.; Ariza, E.The area of micro-abrasion is an interesting and relatively recent area in tribo-testing methodologies, where small particles of less than 10 mm are employed between interacting surfaces. It is topical for a number of reasons; its direct relation to the mechanisms of the wear process in bio-tribological applications, ease in conducting tests and the good repeatability of the test results. It has widespread appl...
TiCxOy thin films for decorative applications : tribocorrosion mechanisms and s...
Mathew, M. T.; Ariza, E.; Rocha, L. A.; Fernandes, Ana C.; Vaz, F.Recently, tribocorrosion is widely accepted as an interdisciplinary area of research and such studies on the various materials is gaining more attention by the scientist and engineers due to its practical and economical significances. Hence the main objective of present work was to investigate the tribocorrosion behavior of single layered titanium oxycarbide, TiCxOy, thin films on a reciprocating sliding tribo-...
Comparative behaviour in terms of wear and corrosion resistance of galvanized a...
Souza, M. E. P.; Ariza, E.; Ballester, M.; Rocha, L. A.; Freire, C. M. A.Materials degradation due to simultaneous chemical and mechanical effects may occur under a variety of conditions. Galvanized and zinc-iron electrodeposited steels are widely used to protect automobile bodies against corrosion. In such applications, it is important to investigate the electrochemical and tribological behaviour of the coatings, in order to understand the behaviour of those surfaces in a tribologi...
Tribocorrosion behaviour of ZrOxNy thin films for decorative applications
Ferreira, S. C.; Ariza, E.; Rocha, L. A.The aim of this work is the investigation of the tribocorrosion behaviour of single layered zirconium oxynitride, ZrOxNy, thin films in 11 reciprocating sliding and immersed in an artificial sweat solution at room temperature. During the wear tests samples were kept under 12 potentiostatic control and the corrosion current were monitored. Also, Electrochemical Impedance Spectroscopy (EIS) tests were performed b...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||